Use the CDS builder to package the impromptu reposrts, the catalog and all surpporting files, for use with impromptu web reports in a posting folder om IWR server. Then use Impromtu Web Report-Report Administration utility to publish the reports To Upfront Portal, which is web-based cognos utility to provides end users with a single, Web-based point of personalized access to Cognos business intelligence information and non-business intelligence content.
Good Luck